hi_about_img = new Image();
hi_about_img.src = "../images/about2.gif";
hi_home_img = new Image();
hi_home_img.src = "../images/home2.gif";
hi_download_img = new Image();
hi_download_img.src = "../images/download2.gif";
hi_purchase_img = new Image();
hi_purchase_img.src = "../images/purchase2.gif";
hi_support_img = new Image();
hi_support_img.src = "../images/support2.gif";